science

posted by .

Most proteins (do or don't) pass through the plasma membrane? Explain?

Substances that dissolve in (lipids or water) can more readily pass across the plasma membrane. Explain

Ions can cross the plasma membrane more easily if they have the (same or opposite) charge as the membrane. Explain.

Plasma membranes have special molecules that help to transport substances across the membranes. These molecules are named what?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. please help-plasma membrane

    I got this question marked wrong on a paper. Unfortunately, my prof didn't explain. _________________ subtances can pass through the plasma membrane. I put "nonpolar". What is wrong with this and does anyone know the correct solution/answer?
  2. bio "plasma membrane"

    When a plasma membrane has a pressure of zero, passive transport STOPS IS THAT TRUE OR FALSE?
  3. BIO

    All cells have these two characteristics: a contain DNA in the nucleus and have a plasma membrane b produce a cell wall outside of the plasma membrane c contain mitochondria and chloroplasts d have a plasma membrane and ribosomes in …
  4. bio (plasma membrane)

    I understand that the plasma membrane is composed of a polar head and non polar tail. I read in my textbook that small non-polar molecules readily pass through and that polar and non-polar repel. so how do non-polar substance pass …
  5. Animal Physiology-Membrane Potential

    Intracellular Extracellular Na+ 12 mM 160 mM Cl- 7 mM 110 mM K+ 140 mM 5 mM 1.How do you calculate the equilibrium potential for potassium, K+, under these conditions?
  6. Biology*STUCK*

    The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates …
  7. Biology*STUCK*

    The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates …
  8. science

    Hi,here is a text I saw on the Internet "The membrane is highly permeable to non-polar (fat-soluble) molecules. The permeability of the membrane to polar (water soluble) molecules is very low. The permeability to charged molecular …
  9. science

    In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant?
  10. Science

    Which of the following statements best explains the relationship between the mitochondria and the plasma membrane?

More Similar Questions